CN216732937U

CN216732937U - Screw for conical double machine barrel

Info

Publication number: CN216732937U
Application number: CN202220252251.9U
Authority: CN
Inventors: 贺乾辉
Original assignee: Zhejiang Jinteng Machinery Manufacture Co ltd
Current assignee: Zhejiang Jinteng Machinery Manufacture Co ltd
Priority date: 2022-02-08
Filing date: 2022-02-08
Publication date: 2022-06-14
Anticipated expiration: 2032-02-08

Abstract

A screw rod for awl twin-cylinder, including feeding section, melting section, homogenization section, plastify section, extrude the section be provided with the flight on feeding section, melting section, homogenization section, plastify section, the section of extruding, the flight is the independent flight that breaks off each other on feeding section, melting section, homogenization section, plastify section, the section of extruding, be equipped with the segmentation piece on the melting section body, the segmentation piece is S type range, and each section flight is the independent flight that breaks off each other in the awl twin-screw, and the screw pitch of feeding section is great, is equipped with the segmentation piece and is S type range on the melting section body for a plurality of segmentation pieces can be effectual stir the melting material, make the melting material mix more evenly, and the shearing force is bigger, and the material plasticizing ability is stronger, and the screw rod extrudes material temperature is stable, and little, and finished product output is high, is applicable to various reclaimed materials, Granulating and tubing high-filling materials such as PE, PP, PVC and the like.

Description

Screw for conical double machine barrel

Technical Field

The utility model relates to the technical field of extruder manufacturing, in particular to a screw for a conical double-cylinder.

Background

Twin screw technology has been the most important extrusion technology development over the last 50 years. The technology was commercialized in the 50 s of the 20 th century, a date which shortened nearly 20 years compared to its first appearance. Engineers in italy and germany have first developed successful twin screw extruders, including co-and counter-rotating, with the initial aim of increasing the efficiency of production of PVC pipes. The founder Robert Colombo, LMP (Lavorazione Material Plastic), Inc., first tried to mix cellulose acetate with twin screws to avoid the use of solvents. In 1938 he assumed the use of an intermeshing, co-rotating twin screw extruder for PVC pelletizing for pipe extrusion. Before this, the preparation of PVC pipes has been carried out using press equipment. Since then, co-rotating twin screw extruders have dominated the extrusion of PVC-U. Twin screws can achieve high throughput at low shear rates, thus reducing the amount of expensive stabilizer. Twin screw extruders are also used to compound and pelletize the resin. The method plays an important role in mixing fillers and fibers. Also used in the fields of reaction processing such as polymerization, grafting, modification and the like.

The twin-screw extruder is formed by a transmission device, a feeding device, a charging barrel, a screw and the like, and the functions of all components are similar to those of a single-screw extruder. But the principle of occupation is very different. In a twin-screw extruder, material is fed by a feeding device (generally quantitative feeding) and reaches a die of a machine head through the action of a screw, and in the process, the movement condition of the material is different due to different meshing modes and different convolution directions of the screw. The twin-screw extruders usually used for PVC profile extrusion are usually closely intermeshing and counter-rotating screws, and few are those using co-rotating twin-screws, but generally operate at low speeds, in the range of about 10 r/min. The high-speed meshed co-rotating type double-screw extruder is used for mixing, exhausting and granulating or is used as a continuous chemical reactor, and the maximum screw speed range of the extruder is 300-600 r/mim.

But because the screw rod that has now all adopts the body of rod and sets up the screw thread on the body of rod to constitute, and the interval between the screw thread is unanimous for in the middle of the process of the ejection of compact, the melting material in the feed cylinder can't obtain abundant even stirring and mix, makes the effect of moulding plastics not good, makes technology plastics product produce a large amount of bubbles in the middle of injection moulding's process easily, thereby has reduced the quality of shaping engineering plastics by a wide margin, and the practicality is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing the conical twin-screw which has good extrusion effect, uniform plasticization and difficult coking and material blockage aiming at the current situation of the prior art.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the screw for the conical twin-cylinder comprises a feeding section, a melting section, a homogenizing section, a plasticizing section and an extruding section, wherein screw ridges are arranged on the feeding section, the melting section, the homogenizing section, the plasticizing section and the extruding section, the screw ridges are independent screw ridges which are mutually disconnected on the feeding section, the melting section, the homogenizing section, the plasticizing section and the extruding section, and cutting blocks are arranged on a melting section body and are arranged in an S shape.

The melting section body is also provided with a plurality of rows of stirring columns, and the stirring columns and the dividing blocks are arranged in a staggered manner. The stirring columns in different rows are arranged in a staggered manner.

The sectional view of the dividing block is a diamond shape.

And a V-shaped groove is arranged on the screw edge of the plasticizing section.

And a backflow groove section is arranged between the homogenizing section and the plasticizing section.

Has the beneficial effects that: the utility model not only has the advantages of a common conical double screw, but also has the advantages that the screw edges of all sections in the conical double screw are independent screw edges which are mutually disconnected, the screw pitch of the feeding section is larger, the cutting blocks are arranged on the melting section body and are arranged in an S shape, so that a plurality of cutting blocks can effectively stir the melting material, the melting material is more uniformly mixed, the shearing force is larger, the plasticizing capacity of the material is stronger, the temperature of the screw extrusion material is stable, the pressure fluctuation is small, the finished product yield is high, and the utility model is suitable for granulating and pipe-making of various reclaimed materials, PE, PP, PVC and other high fillers.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

Fig. 2 is an enlarged view of a portion a.

Detailed Description

The utility model is further described with reference to the following examples.

The embodiment of the utility model provides a screw for a conical twin-cylinder, which comprises a feeding section 1, a melting section 2, a homogenizing section 3, a plasticizing section 4 and an extruding section 5, wherein the feeding section 1, the melting section 2, the homogenizing section 3, the plasticizing section 4 and the extruding section 5 are provided with screw edges, the screw edges are independent screw edges which are mutually disconnected on the feeding section 1, the melting section 2, the homogenizing section 3, the plasticizing section 4 and the extruding section 5, a body of the melting section 2 is provided with a partition block 6, and the partition blocks 6 are arranged in an S shape, so that the utility model has the advantages of common conical twin-screw, each screw edge in the conical twin-screw is an independent screw edge which is mutually disconnected, the screw pitch of the feeding section 1 is larger, and the partition block 6 is arranged in the S shape on the body of the melting section 2, so that the plurality of partition blocks 6 can effectively stir molten materials to ensure that the molten materials are mixed more uniformly, the shearing force is larger, the material plasticizing capacity is stronger, the temperature of the screw extrusion material is stable, the pressure fluctuation is small, the finished product yield is high, and the method is suitable for granulation and pipe making of various reclaimed materials, PE, PP, PVC and other high filling materials.

Still be equipped with multiseriate stirring post 7 on the melting section 2 body, the setting of staggering of the stirring post 7 of different ranks, stirring post 7 can promote the mixing of material.

The stirring column 7 and the cutting block 6 are staggered, so that the molten materials are mixed more uniformly, bubbles are not generated, the transmission of the molten materials is accelerated, the quality of the molded engineering plastics is improved, and the practicability is high.

The sectional view of the segment 6 is a diamond shape.

The screw edge of the plasticizing section 4 is provided with a V-shaped groove, and the plasticizing section 4 adopts a V-shaped groove labyrinth unequal mixing.

A backflow groove section 8 is arranged between the homogenizing section 3 and the plasticizing section 4, so that part of incompletely melted materials flow back for secondary treatment.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A screw rod for tapering two barrels, including feeding section (1), melting section (2), homogenization section (3), plastify section (4), extrude section (5) feeding section (1), melting section (2), homogenization section (3), plastify section (4), extrude and be provided with the spiral shell arris on section (5), its characterized in that: the screw edges are independent screw edges which are disconnected with each other on the feeding section (1), the melting section (2), the homogenizing section (3), the plasticizing section (4) and the extruding section (5), the body of the melting section (2) is provided with a dividing block (6), and the dividing block (6) is arranged in an S shape.

2. The screw for a tapered dual barrel of claim 1, wherein: the melting section (2) body is also provided with a plurality of rows of stirring columns (7), and the stirring columns (7) and the dividing blocks (6) are arranged in a staggered manner.

3. The screw for a tapered dual barrel of claim 2, wherein: the stirring columns (7) in different rows are arranged in a staggered way.

4. The screw for a tapered dual barrel of claim 1, wherein: the section of the dividing block (6) is in a diamond shape.

5. The screw for a tapered dual barrel of claim 1, wherein: and a V-shaped groove is arranged on the screw edge of the plasticizing section (4).

6. The screw for a tapered dual barrel of claim 1, wherein: a backflow groove section (8) is arranged between the homogenizing section (3) and the plasticizing section (4).